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package mx.its.dsw2.biblioteca.dao;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import mx.its.dsw2.biblioteca.modelo.Categoria;

/**
 *
 * @author Maq-8
 */
@Stateless
public class CategoriaDao extends AbstractDao<Categoria> implements CategoriaDaoLocal {

    @PersistenceContext(unitName = "Biblioteca8E-ejbPU")
    private EntityManager em;

    @Override
    protected EntityManager getEntityManager() {
        return em;
    }

    public CategoriaDao() {
        super(Categoria.class);
    }

    @Override
    public boolean findByDuplicity(Categoria category) {
        Query q = em.createNamedQuery("Categoria.findByClave");
        q.setParameter("clave", category.getClave());
        return !q.getResultList().isEmpty();
    }
}
